Better error messages when RDoms depend on Funcs or Vars
Better error messages when RDoms depend on Funcs or Vars


Former-commit-id: 70543fd533ea7a37e39b3d9a43ce045fe3c05b1f
darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide